| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-78 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B57-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-73
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-78 |
| filingDate |
1975-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1977-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_030dba6526535c3103afc7c083ea45b3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3a30dbdc4265b598ea420c644dd27291 |
| publicationDate |
1977-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4029677-A |
| titleOfInvention |
Spirodipyrans useful as dye precursors for copying processes |
| abstract |
New spirodipyrans of the formula <IMAGE> (I) in which A is an optionally substituted benzene or naphthalene nucleus, B is dimethylene, trimethylene or tetramethylene substituted by from 1 to 3 alkyl groups and R1 and R2 are each alkyl of 1 to 6 carbon atoms, which may be substituted by cyano. The compounds (I) give deep blue to violet colorations with acid materials. They may be used for the manufacture of pressure-sensitive recording materials. The compounds (I) exhibit improved solubility in the solvents used for the manufacture of microcapsules. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4384094-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4342696-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4345073-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4348508-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4316027-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4382134-A |
| priorityDate |
1974-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |